
| 2004 | WAR CRIME | Julie Swan | Steve Tiller | The Wedding Collective | Tour | |
| 2004 | REVELATIONS | Shirley | Anthony Clark | Hampstead Theatre | ||
| 1997 | THE COUNTRY WIFE | Lady Fidget | Lawrence Boswell | Centreline Productions | ||
| 1996 | THE HEIDI CHRONICLES | Susie | David Taylor | Greenwich Theatre | ||
| 1992 | WOMEN LAUGHING | Maddie | Richard Wilson | Royal Exchange, Manchester | For this she was nominated for Best Actress in the Manchester Evening News Awards | |
| 1991 | THE PHILANTHROPIST | Araminta | Kenneth Ives | Wyndham’s Theatre | ||
| 1991 | LITTLE EYOLF | Rita Allmers | Steve Tiller | Deptford Birds Nest | For this she was nominated for Best Actress in the Fringe Awards | |
| 1984 | SEE HOW THEY RUN | Ida | Ray Cooney | Shaftesbury Theatre | ||
| 1983 | HAPPY EVENT | Polly | Richard Everett | Theatre Royal, Windsor | ||
| 1983 | LE BOURGEOIS GENTILHOMME | Nicole/Dorimene | Leon Ruben | Lyric Theatre, Belfast | ||
| 1983 | CHORUS GIRLS | Julie | Adrian Shergold | Theatre Royal, Stratford East | ||
| 1982 | HAND OVER FIST | Gwen | Richard Everett | Watermill Theatre, Newbury | ||
| 1981 | THREE SISTERS | Natasha | Leon Ruben | Thorndike Theatre | ||
| 1981 | BUGLAR BOY | Buglar Boy | Leon Ruben | Traverse Theatre | ||
| 1979 | INADMISSABLE EVIDENCE | Jane Maitland | Roger Michell/John Osborne | Royal Court Theatre | ||
| 1978 | SUDDENLY LAST SUMMER | Cathy | Leon Ruben | Thorndike Theatre | ||
| 1977 | HAYFEVER | Jackie | Hugh Goldie | Theatre Royal, Windsor | ||
| 1977 | THE PASSING OUT PARADE | Crab | Jack Emery | Greenwich Theatre | ||
| 1977 | THE ADMIRABLE CRICHTON | Fisher | Mike Ockrent | Greenwich Theatre | ||
| 1975 | THE RELUCTANT DEBUTANTE | Clarissa | Hugh Goldie | Theatre Royal, Windsor | ||
| 1974 | THE MERRY WIVES OF WINDSOR | Anne Page | Bernard Miles | Mermaid Theatre | ||
| 1974 | ON THE ROCKS | Flavia | Bernard Miles | Mermaid Theatre | ||
| 1973 | OTHELLO | Bianca | Philip Grout | Ludlow Festival |
| 2010 | DOCTORS | Cynthia Brass | Geoff Naylor | BBC TV | |
| 2007 | DOCTORS | Margaret Portman | Terry Iland | BBC TV | |
| 2005 | FOOTBALLERS’ WIVES | Fiona | Richard Signy | Shed Productions | |
| 2003 | MY FAMILY | Rhoda Baxter | Dewi Humphries | BBC TV | |
| 2001 | CUTTING IT | Tinker Haines | Roger Goldby | BBC TV | |
| 2000 | COR, BLIMEY! | Maggie | Terry Johnson | Company Pictures | |
| 2000 | THE BILL | Bev Poulter | Jeremy Silbertson | Pearson | |
| 1999 | JONATHAN CREEK | Jackie | Richard Holthouse | BBC TV | |
| 1999 | A TOUCH OF FROST | Amanda | Adrian Shergold | Yorkshire Television | |
| 1996 | THE DARKENING | Dr. Fravell | Steve Hilliker | Electronic Arts | |
| 1995 | TREASURE ISLAND | Long Jane Silver | Ken Russell | ||
| 1995 | THE VET | Danielle Morgan | Colin Gregg | BBC TV | |
| 1993 | LADY CHATTERLEY | Hilda | Ken Russell | BBC TV | |
| 1991 | MINDER (Series VII) | Lorna | Keith Washington | Euston Films | |
| 1991 | SOUTH BANK SHOW: The Secret Life of Arnold Bax | Annie | Ken Russell | LWT | |
| 1990 | OLD FLAMES | Sophie Davenport | Christopher Morahan | BBC TV | |
| 1990 | THE PIGLET FILES | Angela Wagstaff | Robin Carr | LWT | |
| 1989 | BERGERAC | Rita Smith | Stuart Urban | BBC TV | |
| 1988 | SINGLES | Stella | John Davies | Yorkshire Television | |
| 1985/87 | DRUMMONDS | Miranda Quinn | Martyn Friend | LWT | |
| 1987 | HARRY’S KINGDOM | Gloria | Robert Young | BBC TV | |
| 1986 | LONDON’S BURNING: The Movie | Mrs Grant | Les Blair | LWT | |
| 1986 | RUNNING SCARED | Leila | Marilyn Fox | BBC TV | |
| 1985 | TROPICAL MOON OVER DORKING | Camila | Robert Chetwyn | Limehouse obo Ch4 | |
| 1985 | KISSES ON THE BOTTOM | Vera | Jeremy Ancock | BBC TV | |
| 1985 | MARJORIE AND MEN | Maggie | John Davies | Anglia | |
| 1985 | WINTER SUNLIGHT | Wanda | Julian Amies | Limehouse obo Ch4 | |
| 1985 | WYNNE & PENKOVSKY | Mandy Rice-Davies | Paul Seed | BBC TV | |
| 1985 | CHRISTMAS PRESENT | Pamela | Tony Bicat | Kosta Telekation obo Ch4 | |
| 1984 | CHANCE IN A MILLION | Sadie | Michael Mills | Thames TV | |
| 1983 | BENEFIT OF THE DOUBT | Barbara | Paul Seed | BBC TV | |
| 1981/83 | THE LAST SONG | Jane | Sydney Lotterby | BBC TV | |
| 1983 | DOMBEY AND SON | Jemima Toodle | Rodney Bennett | BBC TV | |
| 1981 | MYSTERY OF THE SEVEN DIALS | Vera | Tony Wharmby | LWT | |
| 1981 | BLESS ME FATHER | Molly | David Askey | BBC TV | |
| 1981 | KEEP IT IN THE FAMILY | Marlene | David Askey | BBC TV | |
| 1981 | SENSE AND SENSIBILITY | Charlotte Palmer | Rodney Bennett | BBC TV | |
| 1980 | THE GENTLE TOUCH | Liza | Paul Annette | LWT | |
| 1980 | THE GOOD COMPANIONS | Frida | Leonard Lewis | LWT | |
| 1979 | RUMPOLE OF THE BAILEY | Jane | Peter Hammond | Thames TV | |
| 1978 | RENOIR, MY FATHER | Nelly | Alan Cooke | BBC TV | |
| 1977 | NICHOLAS NICKLEBY | Tilda Price | Christopher Barry | BBC TV | |
| 1977 | SECRET ARMY | Yvonne | Paul Annett | BBC TV | |
| 1977 | JUST WILLIAM | Philippa | John Davies | LWT | |
| 1976 | DICKENS OF LONDON | Fanny Dickens | Marc Miller | Yorkshire Television | |
| 1976 | THE HUNCHBACK OF NOTRE DAME | Fleur de Lys | Alan Cooke | BBC TV |
| 2006 | LILLIE | Scarlett | Christiana Askanis | Cranberry Films | |
| 1996 | MINDBENDER | Kitty Hartman | Ken Russell | Doran Eran Productions | |
| 1995 | ALICE IN RUSSIALAND | Alice | Ken Russell | Momentous Events | |
| 1993 | THE INSATIABLE MRS KIRSCH | Mrs Kirsch | Ken Russell | Ziegler Productions | |
| 1980 | NIJINSKY | Magda | Herbert Ross | Paramount Pictures |
Hettie was a series regular as Susie in CITIZENS on BBC Radio 4. She also played Marilyn Monroe in ANYONE CAN SEE I LOVE YOU for which she was nominated for Best Actress in the Sony Awards and at the Prix Italia. Other radio credits include:
| 2003 | RUMPOLE & THE VANISHING JUROR | Christine | Marilyn Imrie | BBC R4 | |
| 2003 | TIM MERRIMAN’S DAYS OF CLOVER | Catherine | Marilyn Imrie | BBC R4 | |
| 2002 | TIM MERRIMAN’S DAYS OF CLOVER | Sally | Marilyn Imrie | BBC R4 | |
| 1995 | NICHOLAS NICKLEYBY | Marilyn Imrie | BBC R4 | ||
| 1991 | FAR FROM THE MADDING CROWD | Fanny | Marilyn Imrie | BBC R4 | |
| 1980 | SYRUP OF FIGS | Isabelle | Patrick Rayner | BBC R4 |